Cableless elevator



J. H. RICKARD CABLELEss ELEvAToR Filed May 6, 1925 2 Sheets-Sheet 2 Patented Dec. 1, 19255.

UNITED STATES PAT sur orales.

troHNrr. 'Brennan' or LEXINGTON, 'nonnen oanoLrnA.

CABLELESS Application filed May 6,

'State of North- Carolina, have invented. a

newand useful Cableless Elevator, of which the following is a specification.

The device forming the subject `n'iatter of this application is a means for operating an elevator', and theinvention aims to supply a structure of the sort mentioned, wherein cablesweights and the like may be dispensed with, it being possible to .hold the elevator at any desired position simply by stopping the driving mechanism.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that sort to which the invention appertains.

lith the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement rof parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in elevation, a device constructed in accordance with the invention, parts being broken away; Figure 2 is a vertical sectional view showing the upper end of one of the lead screws and attendant parts; Figure 3 is a vertical sectional view showing the lower end of the lead screw and attendant parts; Figure 4 is a top plan; Figure 5 is a section on the line 5-5 of Figure 1; Figure 6 is a section on the line 6-6 of Figure 1.

The device forming the subject matter of this application includes a frame 1. The frame 1 may be variously constructed; in the present embodiment of the invention, but not necessarily, it is made up of a base 2, in the form of a beam, standards 3 connected at their lower ends, by angle brackets 4, to the base 2, and a cap 5 connected to the upper ends of the standards 3 by angle brackets 6. Bearings 7 are secured to the base 2 and may be considered as part of the base for convenience in claiming the invent-ion. The lower ends of guide rods 8 are mounted in the bearings 7. The upper ends ends of the lead screws 9.

ELnva'ron.

1925. serial No. 23,483.

of the guide rods 8 are mounted in the cap 5.r

Lead screws 9 are located between the guide rods 8 and the standards The lower ends of the lead screws 9 are journaled in the bearings 7. The lead screws'9 are rotatable in the cap 5 and are rotatable in bearings 10 secured to the cap, the bearings beingreonsidered as part of the cap, for convenience in claiming the invention. llVorm wheels 11 are secured to the upper bearings 12 are interposed between the hubs ofthe worm wheels 11 and the bearings 10.

The numeral V14V marks a carriage. rllhe carriage may bev constructed in,various ways, depending upon whether passengers or freight are to be carried. The device forming the subject matter of this application will be found peculiarly useful in the handling of freight. The carriage 14 may be made up of a base Vframe 15 and a body 16 thereof. Brackets 17 are detachably mounted on the base frame 15 of the carriage 14 and comprise laterally separable parts. The lead screws 9 are threaded into the brackets 17. The brackets 17 slide on the guide rods 8. Upper brackets 18 are detachably secured to the body 16 of the carriage 14. The brackets 18 comprise laterallly separable parts. The brackets 18 slide on the guide rods 8, and the lead screws 9 preferably are not threaded into the brackets 18.

It is to be observed that the lead screws 9 which support the carriage 14 do not press downwardly on the bearings 7, the lead screws 9 being supported against downward movement solely by the anti-friction bearings 12 at the upper end of the frame 1. The result is that the lead screws and the carriage are suspended, and there isV no tendency for the lead screws to bend laterally, no matter how great the weight of the carriage 14 and its contents may be.

There are spaced bearings 19 on the cap 5 of the frame 1. In the bearings 19, a drive shaft 2O is journaled. Vorms 21 are secured to the drive shaft 20. The worms 21 mesh with. the worm wheels 11 on the lead screws 9. Intermediate its ends, the drive` shaft 20 is supplied with a pulley 22 or any other suitable means, whereby the shaft 2O may receive power from a prime mover.

Then the shaft 2O is rotated in one direc tion, the carriage 14 will be elevated, and

Anti-friction f when the shaft 2O is rotated in on opposite direction, the carriage will be lowered, the lend screws 9 being` threaded into the lower breekete 17 on thoearringe, rotation being uinparted to the leed Screws 9, from the sha-ft Q0, by Way of the Worms 2l and the Worin Wheels 1l. Y o

Hoving thus described the invention, what is'icloiined isz` Y 'Y 1. In e device of the class described, a freine; leedscrens having 'their lower ends mounted in the lower portion of the 'traine against lateral movement, driving eleinenteV on the lead screws and'located abovey the ripperA portiony of the freine, e Cnrriaggef Whereinto the lead screws arethrendedranti- 'fi'iotionf bearingsy interposed between* the" driving elementsnndthe' ir'pper portion/oit the frainei the v:intiffrlotion beminge Corryingrtlieentiret Weightot the lea'deeiren'e and oi the carriage andeifeeting 'a suspension ofthe lead [screw's and Vthe Carriage, guides mounted at their'upper and' lower ends 1in the correspondingportions;of the traine,v and spaced 'from the side portions oit-the i 'eine tween the driving' elements and the upperV portion oithe freine', the anti-friction bem'- mgs carrying the entire Weightoi the' lead Serows and" the Carriage,t and effectingI zi :Snel pension ofthe "leed sereweend the carrie e.

In' testimony that I eloini the"foregoing:V

es my own, llliure hereto affixed my eignuturei Y Y Y JOHN H, RIGKAR'D i 

